MySQL: Two Denial of Service vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200705-11 / MySQL
Release Date	May 08, 2007
Latest Revision	May 08, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-db/mysql	< 5.0.38	>= 5.0.38, < 5.0	All supported architectures

Related bugreports: #170126, #171934

Synopsis

Two Denial of Service vulnerabilities have been discovered in MySQL.

2. Impact Information

Background

MySQL is a popular multi-threaded, multi-user SQL server.

Description

mu-b discovered a NULL pointer dereference in item_cmpfunc.cc when processing certain types of SQL requests. Sec Consult also discovered another NULL pointer dereference when sorting certain types of queries on the database metadata.

Impact

In both cases, a remote attacker could send a specially crafted SQL request to the server, possibly resulting in a server crash. Note that the attacker needs the ability to execute SELECT queries.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All MySQL users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-db/mysql-5.0.38"

4. References

Updated May 08, 2007

Summary: This is a Gentoo Linux Security Advisory

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